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PWFSfiURE DtSTRIBTJTTON SYSTEM <br />1. Select number of perforated laterals _j§__ <br />2. Select perforation spacing * 3 ft. <br />3. Since perforations should not be placed closer than 1 ft. to <br />Ae edge of the rock layer (see p. E-14), subtract 2 ft. from the <br />rock layer length. <br />ItocktafwtaBfdi" ^ <br />4. Determine the number of spaces between p^orations. <br />Divide the length above by perforation spacing and round <br />down to nearest whole number. <br />E-17a <br />Length perf. spacing - ou ft. ♦ ft.«Qiii. spaces <br />5. Number of perforations is equal to one plus the number of <br />perforation spaces. <br />spaces 1 , perforations/lateral <br />6. Multiply perforations per lateral by number of laterals to <br />get total number of perforations. <br />TABLEOR atigndischa <br />HMd Perforadon dlaoittar OndMi) <br />1.0i <br />7/W 1/4 <br />0.74 <br />13 039 0.90 <br />2.0b 030 IM <br />23 039 1.17 <br />3.0 0.9B 138 <br />4.0 1.13 1.47 <br />___Lfi <br />aUM IjO loot of hcid for Midcnllal lyMctM. <br />bUM2i) fMt of hMd for odw flMablWiawftti <br />E-17b <br />laMnIt pmMlttmwk perforations. <br />7. Determine required flow rate by multiplying <br />number of perforations by flow p6r perforation <br />(see page E -17) <br />pafi ^ poi/paf <br />...apriiB <br />9mt' *132indi 13ineli 2J0inch <br />23 14 18 28 <br />3.0 13 17 26 <br />33 12 16 25 <br />4.0 11 15 23 <br />S.0 10 14 22 <br />8. If laterals are connected to header pipe as shown on page E- <br />15, select minimum required lateral diameter from table on <br />page E-17; enter table with perforation spacing and number <br />of perforations per lateral. Select minimum diameter for <br />perforated lateral -____inches. <br />9. If perforated lateral system is attached to manifold pipe near <br />the center, as on page E-12, perforated lateral length and <br />number of perforations per lateral will be approximately one <br />half of that in step 8. Using these values, select minimum <br />diameter for perforated lateral from page E-17 as . <br />inches. <br />E-12